[core][Android][Darwin] LayerManager creates RenderLayer instances

`LayerManager` is now responsible for `RenderLayer` instances creation,
so that there is a single entry point for creating of objects, which
correspond to a certain layer type.

The `LayerType type` field is dropped from `Layer::Impl`.

1 files changed, 6 insertions, 8 deletions

diff --git a/include/mbgl/style/layers/fill_extrusion_layer.hpp b/include/mbgl/style/layers/fill_extrusion_layer.hpp
index 0092e61f3b..059b8f8996 100644
--- a/include/mbgl/style/layers/fill_extrusion_layer.hpp
+++ b/include/mbgl/style/layers/fill_extrusion_layer.hpp
@@ -80,15 +80,13 @@ protected:
     Mutable<Layer::Impl> mutableBaseImpl() const final;
 };
 
-class FillExtrusionLayerFactory : public LayerFactory {
-public:
-    FillExtrusionLayerFactory();
-    ~FillExtrusionLayerFactory() override;
+} // namespace style
 
-    // LayerFactory overrides.
-    const LayerTypeInfo* getTypeInfo() const noexcept final;
-    std::unique_ptr<style::Layer> createLayer(const std::string& id, const conversion::Convertible& value) final;
+class FillExtrusionLayerFactory : public LayerFactory {
+protected:
+    const style::LayerTypeInfo* getTypeInfo() const noexcept final;
+    std::unique_ptr<style::Layer> createLayer(const std::string& id, const style::conversion::Convertible& value) noexcept final;
+    std::unique_ptr<RenderLayer> createRenderLayer(Immutable<style::Layer::Impl>) noexcept final;
 };
 
-} // namespace style
 } // namespace mbgl